The Experts below are selected from a list of 12 Experts worldwide ranked by ideXlab platform

Kk Mohapatra - One of the best experts on this subject based on the ideXlab platform.

  • A Sensorless Field Oriented Control of Induction Motor Using Ripple Currents in Space Phasor Based PWM Control
    EPE Journal, 2006
    Co-Authors: Kk Mohapatra, K. Gopakumar, Baiju, Balarama Murty
    Abstract:

    A scheme for sensorless flux estimation for the induction motor drives is presented in this paper, where the flux information is derived from the Current ripple. The scheme measures the Stator Current Phasor deviation to determine the back emf vector position during the zero vectors of the inverter. The position of the rotor flux is detected indirectly by computing the position of the motor back emf, which is orthogonal to the rotor flux position. The space vector PWM generates a Current ripple pattern in the machine Current, which depends upon the ripple voltage and equivalent Stator leakage inductance. For high speed operation when the time duration for the zero vector switching states are small, an indirect method for estimation of flux position is proposed, where the effect of active voltage vectors on the Stator ripple Current is eliminated by creating a virtual short circuit at the motor terminals. This is achieved by linear transformation of the fundamental components of two immediate Current space Phasor deviations within a switching period. The whole scheme is implemented in a space Phasor based PWM drive with constant inverter switching frequency. The position of the back emf is estimated for both high speed and low speed by implementing the proposed method in a TMS320LF2407 DSP based board.

  • A Sensorless Speed Control using Stator Ripple Currents for an Induction Motor Drive with Space Phasor PWM
    IEE, 2004
    Co-Authors: Kk Mohapatra, Gopakumar K, Baiju Mr, Bv Murty
    Abstract:

    In the present paper a simple sensorless speed estimation scheme is presented, where the speed information is obtained from the motor phase Current ripple. The scheme measures the Stator Current Phasor deviation direction to determine the back EMF vector position during inverter zero vector switching states. This measurement of rotor flux position is done indirectly by computing the motor back EMF position which is orthogonal to the rotor flux position. The space vector PWM voltage output in motor phase generates a Current ripple pattern, which depends upon the ripple voltage and equivalent Stator leakage inductance. For high speed operation when the time duration for the zero vector switching states are small an indirect method for flux position estimation is proposed, where the effect of active voltage vectors on the Stator ripple Current is eliminated by creating a virtual short circuit at the motor terminals

Balarama Murty - One of the best experts on this subject based on the ideXlab platform.

  • A Sensorless Field Oriented Control of Induction Motor Using Ripple Currents in Space Phasor Based PWM Control
    EPE Journal, 2006
    Co-Authors: Kk Mohapatra, K. Gopakumar, Baiju, Balarama Murty
    Abstract:

    A scheme for sensorless flux estimation for the induction motor drives is presented in this paper, where the flux information is derived from the Current ripple. The scheme measures the Stator Current Phasor deviation to determine the back emf vector position during the zero vectors of the inverter. The position of the rotor flux is detected indirectly by computing the position of the motor back emf, which is orthogonal to the rotor flux position. The space vector PWM generates a Current ripple pattern in the machine Current, which depends upon the ripple voltage and equivalent Stator leakage inductance. For high speed operation when the time duration for the zero vector switching states are small, an indirect method for estimation of flux position is proposed, where the effect of active voltage vectors on the Stator ripple Current is eliminated by creating a virtual short circuit at the motor terminals. This is achieved by linear transformation of the fundamental components of two immediate Current space Phasor deviations within a switching period. The whole scheme is implemented in a space Phasor based PWM drive with constant inverter switching frequency. The position of the back emf is estimated for both high speed and low speed by implementing the proposed method in a TMS320LF2407 DSP based board.

Bv Murty - One of the best experts on this subject based on the ideXlab platform.

  • A Sensorless Speed Control using Stator Ripple Currents for an Induction Motor Drive with Space Phasor PWM
    IEE, 2004
    Co-Authors: Kk Mohapatra, Gopakumar K, Baiju Mr, Bv Murty
    Abstract:

    In the present paper a simple sensorless speed estimation scheme is presented, where the speed information is obtained from the motor phase Current ripple. The scheme measures the Stator Current Phasor deviation direction to determine the back EMF vector position during inverter zero vector switching states. This measurement of rotor flux position is done indirectly by computing the motor back EMF position which is orthogonal to the rotor flux position. The space vector PWM voltage output in motor phase generates a Current ripple pattern, which depends upon the ripple voltage and equivalent Stator leakage inductance. For high speed operation when the time duration for the zero vector switching states are small an indirect method for flux position estimation is proposed, where the effect of active voltage vectors on the Stator ripple Current is eliminated by creating a virtual short circuit at the motor terminals

K. Gopakumar - One of the best experts on this subject based on the ideXlab platform.

  • A Sensorless Field Oriented Control of Induction Motor Using Ripple Currents in Space Phasor Based PWM Control
    EPE Journal, 2006
    Co-Authors: Kk Mohapatra, K. Gopakumar, Baiju, Balarama Murty
    Abstract:

    A scheme for sensorless flux estimation for the induction motor drives is presented in this paper, where the flux information is derived from the Current ripple. The scheme measures the Stator Current Phasor deviation to determine the back emf vector position during the zero vectors of the inverter. The position of the rotor flux is detected indirectly by computing the position of the motor back emf, which is orthogonal to the rotor flux position. The space vector PWM generates a Current ripple pattern in the machine Current, which depends upon the ripple voltage and equivalent Stator leakage inductance. For high speed operation when the time duration for the zero vector switching states are small, an indirect method for estimation of flux position is proposed, where the effect of active voltage vectors on the Stator ripple Current is eliminated by creating a virtual short circuit at the motor terminals. This is achieved by linear transformation of the fundamental components of two immediate Current space Phasor deviations within a switching period. The whole scheme is implemented in a space Phasor based PWM drive with constant inverter switching frequency. The position of the back emf is estimated for both high speed and low speed by implementing the proposed method in a TMS320LF2407 DSP based board.

Baiju - One of the best experts on this subject based on the ideXlab platform.

  • A Sensorless Field Oriented Control of Induction Motor Using Ripple Currents in Space Phasor Based PWM Control
    EPE Journal, 2006
    Co-Authors: Kk Mohapatra, K. Gopakumar, Baiju, Balarama Murty
    Abstract:

    A scheme for sensorless flux estimation for the induction motor drives is presented in this paper, where the flux information is derived from the Current ripple. The scheme measures the Stator Current Phasor deviation to determine the back emf vector position during the zero vectors of the inverter. The position of the rotor flux is detected indirectly by computing the position of the motor back emf, which is orthogonal to the rotor flux position. The space vector PWM generates a Current ripple pattern in the machine Current, which depends upon the ripple voltage and equivalent Stator leakage inductance. For high speed operation when the time duration for the zero vector switching states are small, an indirect method for estimation of flux position is proposed, where the effect of active voltage vectors on the Stator ripple Current is eliminated by creating a virtual short circuit at the motor terminals. This is achieved by linear transformation of the fundamental components of two immediate Current space Phasor deviations within a switching period. The whole scheme is implemented in a space Phasor based PWM drive with constant inverter switching frequency. The position of the back emf is estimated for both high speed and low speed by implementing the proposed method in a TMS320LF2407 DSP based board.